#include <iostream>


int add(int l, int r){
    return l + r;
}


int main(int argc, char * argv[])
{
    std::cout << "hello world" << std::endl;
    int left = 100;
    int right = 20;
    std::cout << "add " << left << "+" <<  right << " equal " << add(left, right) << std::endl;
    return 0;
}
